Product Overview
900G01-0202 is a self-powered Contact Closure Digital Input Module from Oiltech Controls. It provides 15VDC to external switching hardware and closes the input loop. A closed external circuit causes current flow and sets the input to ON. Controller logic can invert this state when needed.
The module offers 16 single-ended inputs and four common terminals for simple field wiring. Each channel has a green LED to show ON state. A green blinking status LED indicates module scanning. A red status LED shows module diagnostics.
Key Advantages
- Self-powered input loop — no external supply needed for switching hardware.
- Fast response — OFF to ON in 4 ms max; ON to OFF in 6 ms max.
- Galvanic isolation — between field wiring and module.
- Easy diagnostics — per-channel LED plus module status LEDs.
- Simple wiring — four common terminals reduce field effort.
Technical Specifications
| Brand | Oiltech Controls |
| Model | 900G01-0202 |
| Series | Digital Input Module – Contact Type |
| Module Type | Contact Closure Digital Input |
| Inputs per module | 16 (single-ended) |
| Voltage supplied by controller | 15 VDC normal |
| Maximum contact resistance | 1000 ohms |
| Galvanic isolation | Between field wiring (input or output) and module |
| OFF to ON response time | 4 ms max (excludes controller scan and backplane transmission) |
| ON to OFF response time | 6 ms max (excludes controller scan and backplane transmission) |
| Switching current | 2.6 mA nominal |
| Indicators | Green LED per channel (ON state); green blinking status LED (scan); red status LED (diagnostics) |
| Operating temperature | 0 to 60 °C (typical industrial) |
| Storage temperature | -40 to 85 °C |
| Humidity | 5 to 95 % non-condensing |
| Noise immunity | Designed for industrial environments; isolation supports noise rejection |
Installation Guide
- Mount the module in a compatible controller rack or backplane.
- Connect external dry contacts to input terminals and common terminals.
- Use shielded wiring for noisy plant environments.
- Keep field wiring separated from high-voltage lines.
- Check green channel LEDs after power-up.
- Confirm green blinking status LED shows active scanning.
- If red status LED is on, check module diagnostics before operation.
Commissioning and Maintenance
- Verify 15VDC loop supply from the controller.
- Test each input with a known contact closure.
- Measure contact resistance; keep below 1000 ohms.
- Use controller logic to invert ON/OFF state if needed.
- Clean terminals only with approved contact cleaners.
- Replace module if red diagnostics LED stays on.
Compatibility Notes
- Fits controllers that support the 900G01 module series.
- Works with dry contact switches, relays, and pushbuttons.
- Four common terminals simplify multi-channel field wiring.
- Isolated design supports mixed field wiring arrangements.
- Contact Oiltech Controls for backplane compatibility checks.
Diagnostic Capabilities
- Per-channel green LED — shows digital input ON state.
- Green blinking status LED — confirms module scanning.
- Red status LED — indicates module diagnostics exist.
- Controller logic can invert input state for flexible fault handling.
- Fast response times help with short pulse detection.
Typical Applications
- Dry contact monitoring in industrial control panels.
- Pushbutton and selector switch input.
- Relay contact status feedback.
- Limit switch and position sensing.
- Obsolete control system upgrades with contact closure inputs.
- Alarm and interlock status monitoring.
Why Buy From Oiltech Controls?
- 15+ years of industrial automation spare parts experience.
- Global shipment support via FedEx, UPS, and DHL.
- Tested industrial surplus and refurbished options available.
- 12-month warranty on qualifying products.
- Technical verification before shipment on every order.
- Support for obsolete control systems and hard-to-find modules.
Packing List and Warranty
- 1 × 900G01-0202 Contact Closure Digital Input Module.
- Anti-static protective packaging.
- Documentation or label reference as available.
- 12-month warranty covers functional defects under normal use.
- Shipping via FedEx, UPS, or DHL — selected at order confirmation.
Certifications and Compliance
- Built for industrial automation environments.
- Galvanic isolation supports safe field-to-module separation.
- CE and RoHS compliance may apply by batch — confirm with Oiltech Controls.
- Contact us for specific certificate requests before purchase.
FAQ
Q: How many inputs does the 900G01-0202 have?
A: It has 16 single-ended contact closure inputs.
Q: Does the module need an external power supply?
A: No. It is self-powered and supplies 15VDC to external switching hardware.
Q: What is the maximum contact resistance?
A: 1000 ohms.
Q: How fast does the input respond?
A: OFF to ON is 4 ms max. ON to OFF is 6 ms max. These values exclude controller scan and backplane transmission.
Q: What do the LEDs mean?
A: Green per-channel LED = input ON. Green blinking status LED = module scanning. Red status LED = module diagnostics exist.
Q: Can the ON state be inverted?
A: Yes. Controller logic can invert the input state when necessary.
Q: What shipping methods do you use?
A: FedEx, UPS, and DHL.
Q: What is the warranty?
A: 12 months on qualifying products.
Contact Information
Inquiries: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
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